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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01cf487fe23d8f8b9491ac1cc5c114cc88c64ac5aab78e9f0af5a60c24fba11b' 
  AND token = 'XQBzG8HTgrJqbKUZTCk26wMVETEEut1TPRA9blHqe50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}